Originally Posted by Thunderbird
I'm not sure what tool you are using but both xgamma and nvidia-settings support this properly. In case of xgamma you have separate -rgamma/-ggamma/-bgamma options and in nvidia-settings (the gui) you can set the gamma per channel.
I am using nvidia-settings. I will install xgamma if it's not installed. I'm assuming xgamma is a different tool, correct?